3.4 lifters.
No, you should not have to change the head, you'll have to pull the valve cover, the rocker arms, the intake, the pushrods. Make sure you keep them all in order, and with the same cylinder/valve. Haynes makes a good manual based on a teardown and reassembly of a Torrent/Equinox. I would suggest that. They may even make it in your language.
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